
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Transcribed Image Text:A survey by American Express Spending reported that the average amount spent on
a wedding gift for a close family member is $166.
Based on a random sample of 45 people who purchased wedding gifts for close
family members, a 95% confidence interval for the mean amount spent was found to
be $(149.08, 171.92)
Select the best interpretation.
The interval contains $166, there is evidence supporting the claim by American
Express Spending.
The interval is biased because it only sampled 45 people, and is not 100%
confident.
The interval does not contain $166, the report by American Express Spending is
not valid.
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